Rebuilding yourself is hard, rebuilding trust is just as hard, they both take time.Right now deal with you and your issues and that starts with coping with your feelings. I think when you feel that mistrust and jealousy building in you, think long and hard before you act or speak, even if you count to 10 a million times, and in this way you give the feeling time to pass, without impulsive words or actions making more problems. Have a plan of action when those feelings pop up, like a mental distraction, focusing on something else for a minute, again, to give those feeling a chance to pass. and they will once you have trained your brain to react differently.
You have to learn these coping skills and more, to help you get over the past, deal with the NOW, and look brightly at the future.
Coping with Stress
Coping.org, Tools for coping with life's stressors
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coping skills for your own reading to give you other tools and insights into dealing with your issues, as facts help identify feelings, and dealing with them.
A good 3rd party can help guide you thru the process of overcoming your fears. Fear is at the root of your issues. I know your going thru a lot and have been thru a lot. You need time, and HELP, to heal from what you have been thru, so you can make better decisions for yourself.